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Question about momentum unit and its conversion to energy.

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  1. Dec 11, 2014 #1

    goodphy

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    Gold Member

    Hello.

    I'm reading some accelerator physics paper showing the momentum unit for the accelerated particles as MeV/c.

    I'm not interested in the momentum but energy thus I really want to convert this to energy.

    How it is done? Simply multiplying c? if so, there must be some reason for justify the action.

    Please help me to go further.
     
  2. jcsd
  3. Dec 11, 2014 #2

    Dale

    Staff: Mentor

    Momentum, energy, and mass are related by ##m^2 c^2=E^2/c^2-p^2##
     
  4. Dec 11, 2014 #3

    jtbell

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    Staff: Mentor

    Or, the way I like to remember it: ##E^2 = (pc)^2 + (mc^2)^2##.

    E, pc and mc2 all have units of energy (MeV or joules or whatever)
     
  5. Dec 11, 2014 #4

    goodphy

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    Oh thanks people!

    Thus..since momentum in the paper is, for example, 0.79 MeV/c so pc should be simply the momentum multiplied by c, 0.79 MeV right?
     
  6. Dec 12, 2014 #5

    jtbell

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    Staff: Mentor

    Right.
     
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